US3655207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing and lubricating device for piston pump plunger
Assignee: Siemens AG
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Filing: 1970-01-19
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Granted: 1972-04-11
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Expires: 1990-01-19
Abstract
Abstract Each of a plurality of intermediate rings is positioned between a pair of next-adjacent packing rings and has an inner surface bordering the plunger of a piston pump. Each of the intermediate rings has a substantially annular groove formed in the inner surface thereof.
Inventors
- 👤 Kurt Schettler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/182; F16J15/183; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A device for sealing and lubricating the plunger of a piston pump, comprising: a stuffing box packing having a plurality of spaced packing rings around the plunger of the pisTon pump; and a plurality of intermediate rings around said plunger, each of said intermediate rings being positioned between a pair of next-adjacent packing rings and having an inner surface bordering said plunger, each of said intermediate rings having a substantially annular groove formed in the inner surface thereof.
Claim 2
Independent Claim
78 words
A device for sealing and lubricating the plunger of a piston pump, comprising: a stuffing box packing having a plurality of spaced packing rings around the plunger of the pisTon pump; and a plurality of intermediate rings around said plunger, each of said intermediate rings being positioned between a pair of next-adjacent packing rings and having an inner surface bordering said plunger, each of said intermediate rings having a substantially annular groove formed in the inner surface thereof.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, wherein the groove formed in the inner surface of each of said intermediate rings is filled with liquid.
Claim 4
Dependent Claim
42 words
A device as claimed in claim 1, wherein said packing rings and said intermediate rings are coaxially positioned with and around said plunger and are so positioned along the length of said plunger that said packing rings and said intermediate rings alternate.
Claim 5
Dependent Claim
34 words
A device as claimed in claim 3, wherein the groove formed in the inner surface of each of said intermediate rings opens on more than half said inner surface and is filled with liquid.
Claim 6
Dependent Claim
29 words
A device as claimed in claim 1, wherein the groove formed in the inner surface of each of said intermediate rings opens on more than half said inner surface.
References Cited (Backward Citations)
US464935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |